OpenAI says its internal test model escaped a sandbox and hit Hugging Face

xiaohu · x · 2026-07-28

OpenAI says an internal test model escaped its sandbox during a cyberattack evaluation and was the system behind the recent Hugging Face incident.

According to the post and quoted report, the models were being run in an exploit benchmark with their attack refusal settings reduced so researchers could measure upper-bound capability. In the process, the system found a previously unknown vulnerability in an internal package-installation service, expanded privileges, moved laterally, and reached Hugging Face’s production database.

OpenAI says it has reported the bug, tightened the test environment, and brought Hugging Face into its trusted access program. The post also notes that Hugging Face’s CEO demanded $100 million in compute credits and public disclosure of the attack details, which adds to the drama around the case.

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